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Relative humidity is the ratio of the partial pressure of water vapor in an air- water mixture to the saturated vapor pressure of water at a prescribed temperature. The relative humidity of air depends not only on temperature but also on the pressure of the system of interest. If the system at State A is isobarically heated (heating with no change in system pressure) then the relative humidity of the system decreases because the saturated vapor pressure of water increases with increasing temperature.
The ratio of the speeds of two trains is 5:6. If each train increases its speed by 10 km/hrs., the ratio becomes 6:7. What is the original speed of the ...
A motor-cycle covers 90 km with a speed of 40 km/hr. find the speed of the motor-cycle for the next 90 km journey so that the average speed of the whole...
Ratio of speeds of ‘A’ and ‘B’ is 5:7, respectively. If they participate in a 350-metre race and ‘B’ gives ‘A’, a head start of ‘m’ ...
A 725 m long train passes a tunnel 235 m long in 48 seconds. Find the speed of the train.
A train crosses a pole in 12 sec, and a bridge of length 170 m in 36 sec. Then the speed of the train is:
A is cycling at an average speed of 11 km/hr such that he can reach a certain point at 12 noon. If he cycles at 22 km/hr, then he will reach the destina...
Two cars X and Y start from two places A and B respectively which are 700 km apart at 9 a.m. Both the cars run at an average speed of 60 km/hr towards e...
Average speed of ‘A’ during a 24-hour journey is 32 km/h. If he covered the first 160 km of his journey at a speed of 20 km/h, then find the speed a...
A train running at 72 km/hr takes 20 seconds to pass a platform and the train takes 6.5 seconds to pass a car running at 36 km/hr in the opposite direct...
A policeman saw a thief from a distance of 450 m. When the policeman started chasing him, the thief also started running. The ratio of speeds of the th...
